<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .block{
            height: 200px;
            background-color: #ff0000;
            /* display: block; */
        }
        .inline{
            display: inline;
            /* height: 100px; */
            background-color: #008000;
        }
        .inline-block{
            display: inline-block;
            width: 200px;
            height: 100px;
            background-color: #0000ff;
        }
    </style>
</head>
<body>
    <div class="block">
        block
    </div>
    <div class="inline">inline</div>
    <div class="inline-block">inline</div>
</body>
</html>